| http://www.w3.org/ns/prov#value | - This invention relates to a solar reflecting mirror, e.g. a parabolic shaped solar reflecting glass mirror having a protective coating, e.g. an alkali barrier layer and method of making same, and more particularly, to an alkali barrier layer on the concave surface of the mirror to prevent alkali ions, e.g. sodium ions from precipitating on the concave surface of the mirror.
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